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The potential difference across the terminals of a battery is V1 when there is a current of I1 in the battery from the negative to the positive terminal. When the current is I2 in the reverse direction, the potential difference becomes V2.
a) Compute the internal resistance r of the battery?
b) Compute what is the emf ε of the battery?
Gabriela, hunting for her favorite wooden horse, is running on the ground around the edge of a stationary merry-go-round. find the shortest time it takes for Gabriela to catch up with the horse
As a bar magnet moves toward a 150-turn coil, the magnetic field (which is perpendicular to the plane of the coil) changes from 0.25 T to 0.53 T in 0.3 s. find the magnitude of the induced current in the coil
A uniform 1.7-kg rod that is 0.97 m long is suspended at rest from the ceiling by two springs, one at each end. Both springs hang straight down from the ceiling. The springs have identical lengths when they are unstretched. Their spring constants are..
During a process, 21.6 MJ of heat is added to a closed system. If the internal energy is increased by 59.6 MJ: How much work in Btu was done, Was this work done on or by the system
A Goodyear blimp typically contains 5980 m3 ofhelium (He) at an absolute pressure of 1.10 x 105 Pa. What is the mass (in kg) ofthe helium in the blimp
A bowling ball (mass = 7.2 kg, radius = 0.15 m) and a billiard ball (mass = 0.33 kg, radius = 0.028 m) may each be treated as uniform spheres. What is the magnitude of the maximum gravitational force that each can exert on the other?
An object moves 2.95m in the +x-direction under the influence of a 125N force directed 52 degrees above the x-axis. Find the work done on the object
A spring with a constant k=42.3 N/m has a 2.10 kg mass attached to it. The mass is free to slide on a frictionless track parallel to the spring. What is the total energy in the system
The magnitude and direction of acceleration of body both are constant will the body moves in straight line
During an electrostatic field experiment, you assume that the electric field lines are in the plane of the paper, What condition determines the accuracy of this assumption
A narrow beam of light with wavelengths from 450 nm to 700 nm is incident perpendicular to one face of a 32.00, What is the angular spread of the beam after passing through the prism
A 70 g metal block moving at 200 cm/s slides across a tabletop a distance of 83 cm before it comes to rest. how much does the temperature of the block rise
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